Hey all! I've recently bought a PSP slim (only had it a day) and it came with 3.72, and i've now managed to downgrade it to 3.71 M33-2. god knows how I managed to do it with no problems - just got lucky! I still have some questions, and hoping someone on here will be kind enough to clear it up for me. 1) Right, so the Sony firmware, doesn't allow homebrew, I get that. But what CMF is best to go for, people keep throwing different numbers around, and i'm not sure which is best, if there is a better one, do I have to go through the whole routine again? 2) If i'm running 3.71, and a UMD comes with an later upgrade, does that mean I won't be able to use the UMD until I install the upgrade provided? 3) What is the 1.50 plugin? What does it mean? 4) What relevance does the Kernel version have? Is it something I need to worry about? So sorry if these are really dumb questions, and i'm ashamed to admit it, but a lot of this stuff is going WAY over my head. Thanks in advance!